In-line gas adaptor for endoscopic apparatus

ABSTRACT

The present invention provides an adaptor that is suitable for attachment to an endoscopic device for delivery of a secondary gas. The adaptor can comprise a substantially cylindrical body with a two, opposing closed ends, two fluid transport channels extending through the cylindrical body and opening at the closed ends, and an inlet port extending outward from the cylindrical body and being in fluid connection with one of the fluid transport channels. The adaptor may be used in endoscopy methods and is particularly useful for adding a secondary gas source in an endoscopy procedure.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a continuation of U.S. Application Ser. No.12/881,683, filed Sep. 14, 2010, which claims priority to U.S.Provisional Application No. 61/242,121, filed Sep. 14, 2009, each ofwhich is incorporated herein by reference in its entirety.

FIELD OF THE INVENTION

The present application is directed to devices used in surgicalprocedures, such as endoscopic procedures, and more particularly to adevice that can be used to connect a secondary gas source to anapparatus, such as an endoscopic apparatus.

BACKGROUND

Many invasive medical procedures that previously required major surgeryare now performed using endoscopic instruments. Such instruments canprovide an internal view of particular body parts, organs, or passageswithout requiring invasive surgery. Generally, an endoscopic instrumentmay include one or more channels through which miniaturized, flexibleinstruments can be inserted and advanced. The endoscope typicallyincludes an elongated flexible cable equipped at one end with aneyepiece or other viewing means and at the other end with an opticalhead. Only the head is directly and externally connected to theinstrument. The cable transmits images or image-producing signals fromthe illuminated operative site to the viewing means to provide theinstrument operator with full vision of the actions being performed atthe instrument's working end. A coherent optic bundle extends from thehead and through the flexible cable through the eyepiece for providingthe surgeon with visual confirmation of the instrument's tip or jawaction. The illuminating means may take the form of a light-transmittingwaveguide extending through the cable to illuminate the operative area.The waveguide is connected at its proximal end to a suitablehigh-intensity light source.

The cable of an endoscope also provides a flow passage for the deliveryof fluid (e.g., liquid or gas) for irrigation or other purposes.Typically, the flow passage and the illuminating means are disposed onopposite sides of the coherent image-transmitting waveguide. Inconventional practice, it is necessary to provide a flow of sterilewater across the optic head to prevent the buildup of materials (e.g.,surgical debris and body fluids) on the optic head. This flow of wateroperates, in a sense, like a windshield wiper/washer assembly.

In common designs, an endoscopic instrument typically has a control bodywhich is connected by a light guide tube to a light guide connector,which actually can include a plurality of connectors that can suitablyreceive various fittings. For example, the light guide connector caninclude a connector orifice that receives a grounding lug, a suctionport, an air inlet, and a water inlet. As such, the air and water aredelivered through the light guide connector, through the light guidetube and into the control body. Alternatively, the control body can alsoinclude a water port so as to allow water to be directly provided to thecontrol body. Suitable valves are provided on the control body so as tocontrol the flow of water through the control body and over the optichead of the instrument.

For example, FIG. 1 illustrates an endoscope system that is unmodified(i.e., includes no secondary gas supply means). The endoscope is shownto include a shaft (insertion tube) connected to a control body thatincludes a biopsy port, air-water and suction valves, and angulationcontrols. The control body is connected to an umbilical (light guideconnecting tube) that further connects to an electrical pin unit, whichis directly connected to a light source and is connected via a videoconnection lead (and plug) to a video processor. The image produced bythe endoscope is transmitted via a fiber optic bundle, or electronicallyfrom a charge-coupled device (CCD) chip. FIG. 1 illustrates a videomonitor and attached keyboard for viewing images and inputting commands.The electrical pin unit includes a port for a water bottle connectorthat connects to a water bottle for providing irrigation.

The somewhat complex internal anatomy of the endoscope is furtherillustrated in FIG. 2, which shows a detailed view of the endoscope fromFIG. 1. As seen in FIG. 2, the shaft incorporates an instrumentationchannel extending from the entry biopsy port to the tip of theinstrument. Channel sizes can vary from about 1 to 5 mm. Again, theendoscope includes no means for a secondary gas supply.

As seen in FIG. 1, the known practice has been to use a water bottlewith a cap having a tube running therethrough. The tube typically has afitting at the end distal to the bottle to allow for connection to theair/water connection port of the light guide connector (of theelectrical pin unit, as illustrated in FIG. 1) or to the port on theendoscope control body. Typically, the tube connecting the water bottleto the endoscope is formed of an inner tube and an outer tube. The outertube extends into the water bottle and is connected to the cap of thewater bottle. In normal practice, air is delivered through the areabetween the inner tube and the outer tube so as to pressurize theinterior of the water bottle and force water to flow through the tubeand into the endoscope at a desired rate.

The known endoscopy assemblies have various limitations in relation tothe provision of a gas source. For example, ambient air is often pumpedinto the system to charge the water bottle. It can be desirable,however, to use a secondary gas source instead of ambient air. Knowndevices allowing for substitution with a secondary gas source areexcessively expensive. Moreover, known devices suffer problemsassociated with disinfection after each use. In practice, after usage,any fittings associated with the endoscopy device are sterilized, suchas by glutaraldehyde disinfection and/or autoclaving. This creates aconsiderable expense to the hospital including the considerable laborexpense associated with the disinfection of various parts and fittings.It also has not typically been feasible to simply dispose of variousendoscopy fittings after a single use because of the previously notedexpense associated with such parts.

Still further, the provision of a secondary gas source is complicated inthat known endoscopy devices do not have universal, standardizedconnections. For example, the three main manufacturers of endoscopydevices (Olympus Optical Company, Ltd., Fujifilm Medical Systems, or itssubsidiary, Fujinon Corporation, and Hoya Corporation, or itssubsidiary, Pentax) each manufacture devices with an endoscope body thatis universal to its own line of products but which is not suited forinterchanging of parts between brands. Specifically, water bottleconnectors for each manufacturer connect to the endoscope body via adifferent type of connection. Thus, there remains a need in the art foradaptors that allow for provision of a secondary gas in a manner that iseconomical and easy to use.

SUMMARY OF THE INVENTION

The present invention provides adaptors to improve the ease of provisionand use of a secondary gas source in endoscopy. The inventive adaptorscan be designed and shaped to function with endoscopic devices generallyor may be designed and shaped to function with endoscopic devices havinga particular structure unique to a single manufacturer of endoscopicdevices. In light of their economical nature (and option for disposable,single use), the inventive adaptors allow for provision of a secondarygas in an endoscopy procedure without the requirement of costly,specialized equipment, such as a water bottle with a specially designedcap or a re-usable adaptor that has a much greater initial cost and mustbe sterilized between uses. These and other benefits of the presentinvention are more fully described herein.

In certain embodiments, the present invention provides adaptors that canbe used with endoscopic devices. In particular, the adaptors can allowfor the provision of a secondary gas to the endoscopic device viain-line placement between the endoscopic device and a water sourceconnector.

In one embodiment, an adaptor according to the invention can comprise asubstantially cylindrical body, the body being shaped and includingspecific structures to facilitate in-line attachment between anendoscope and a water source connector. For example, the cylindricalbody can have a wall forming the sides of the cylinder, and the cylinderbody can include two, opposing ends that are closed. The term closed canindicate that a structural component is present and is in contact withthe cylinder wall at all points around the circumference thereof. Asdescribed below, certain further structural components can provideopenings in the cylinder end, but this does not limit the closed natureof the cylinder since the formed openings provide for passages throughthe cylinder without necessarily providing an opening into the actualinterior of the cylinder. Specifically, in embodiments wherein thecylinder includes open space therein, the cylinder remains closedbecause the openings formed in the ends of the cylinder do not allow forentry of fluid material into the open space in the cylinder, onlypassage through the cylinder without access to the cylinder interior(i.e., not contact with the interior surface of the cylinder walls). Inspecific embodiments, the adaptor can be described as comprising asubstantially cylindrical body having a wall, a first closed end, and asecond, opposing closed end.

As noted above, the inventive adaptor further may comprise one or morefluid transport channels. Such fluid transport channels may comprise achannel wall and can extend through the cylindrical body of the adaptorand open at the first and second closed ends of the cylindrical body.The presence of the channel walls prevents any fluid transportedtherethrough from actually entering any open space within thecylindrical body of the adaptor.

In light of the above, it can be seen that the adaptor can have avariety of separably definable components with walls. For example, thecylindrical body can have defined walls, a liquid channel extendingend-to-end through the cylindrical body can have defined walls, and agas channel extending end-to-end through the cylindrical body also canhave defined walls. In some embodiments, two or more components mayshare a wall. For example, in one embodiment, a portion of the gaschannel (or the gas channel wall) can form a portion of the cylindricalbody wall. Likewise, the gas channel and the liquid channel could be insufficiently close proximity that the walls of the two channels could bephysically attached and could even be a single piece with two channelsformed therein and two separate openings at each closed end of thecylindrical body. In another embodiment, one channel (e.g., the gaschannel) could be formed within the cylindrical body wall. In otherembodiments, the cylindrical body could be substantially solid, and thechannels formed therein could be substantially the only free spacewithin the cylindrical body.

In further embodiments, the adaptor can comprise an inlet port extendingoutward from the wall of the cylindrical body and having a centralpassage therein. Preferably, the passage extends through the wall of thecylindrical body and is in fluid connection with one of the first andsecond fluid transport channels. In other embodiments, the inlet portmay be described as intersecting a wall of the adaptor body and/orintersecting the wall of one of the fluid transport channels to form anopening therein.

In preferred embodiments, the inlet port of the inventive adaptor maycomprise a luer, barb, tapered, threaded, snap fitting, or conicalconnector. Such connectors are more fully described below. In specificembodiments, the luer connector may be in accordance with ISO594-2:1998. In an alternative embodiment, the adapter may include anadhesive for coupling the inlet port to a connection associated with thesecondary gas source.

The alignment of the inlet port in relation to the adaptor body canvary. Specifically, the inlet port could have any length or geometry(i.e., substantially straight, L-shaped, curved, or the like) useful tofacilitate ease of attachment of a secondary gas source to the inletport. In specific embodiments, the inlet port is substantiallyperpendicular to the wall of the cylindrical body of the adaptor. Thus,the attachment of the inlet port to the cylindrical body may be suchthat the exterior surfaces of the walls of the components are at about a90° angle. Of course, such angle could vary as deemed useful. In someembodiments, the angle can be between about 10° and about 90° , betweenabout 20° and about 90°, between about 30° and about 90°, between about40° and about 90°, between about 45° and about 90°, between about 50°and about 90°, or between about 60°and about 90°. In specificembodiments, the length of the inlet port may be about 1 cm to about 5cm, about 1.5 cm to about 4.5 cm, about 1.5 cm to about 4 cm, or about1.5 cm to about 3 cm. Preferably, the alignment, shape, and length ofthe inlet port provide for ready access while the adaptor is insertedin-line between an endoscope control body and a water source connector.Component geometry also may be related to the fluid transport channelsof the adaptor body. For example, the first and second fluid transportchannels may be described as being substantially parallel. Moreover,they may be described as being in a side-by-side relation. As will beevident from the further disclosure herein, such alignment can beparticularly useful to facilitate use with specific types of endoscopedevices, and any adaptor not having such alignment or structure would beexpressly excluded from being used in connection with the specific typeof endoscope device. Specifically, in some embodiments, the inventiveadaptor can be designed and shaped for attachment specifically to aFujinon-manufactured endoscopic device. Such specificity can arise fromthe specific structure and placement of elements on theFujinon-manufactured endoscope devices for delivery of fluid into theendoscope (such as from a water bottle). The adaptor of the presentinvention may be expressly structured for insertion in-line in aFujinon-manufactured endoscope and water bottle connector assembly.

In specific embodiments, the fluid transport channels may be describedin relation to the specific type of fluid to be transferredtherethrough. For example, the first fluid transport component may bereferred to as a liquid transport component. Similarly, the second fluidtransport channel may be referred to as a gas transport component.Preferably, the inlet port included in the adaptor extends outward fromthe wall of the cylindrical body of the adaptor in a position whereinthe inlet port is in fluid connection with the gas transport channel.Thus, the channel formed in the gas inlet port could pass through thewall of the cylindrical body and/or the wall of the gas transportchannel.

Sizes and dimensions of specific portions of the inventive adaptor canbe specifically determined for use with specific devices. For example,endoscope control bodies manufactured by Fujinon Corporation are knownto include a fluid transport hub to facilitate transfer of water to andfrom a water bottle via attachment to a specifically formed receptaclein a water bottle connector. In certain embodiments, the inventiveadaptor may be formed to specifically interact with such hub andreceptacle.

For example, in one embodiment, the cylindrical body of the adaptor maycomprise a flange in the proximity of one end (e.g., the first closedend). Specifically, the flange can comprise a flange wall that issubstantially parallel to the wall of the cylindrical body. Thisstructure particularly can be useful to provide means for receiving afluid transport hub, which typically can be shaped substantially likethe open end of a cylinder. The relationship of the flange wall to thewall of the cylindrical body of the adaptor thus can form an annularspace that can be shaped specifically to receive the correspondinglyshaped hub on an endoscope body, such as that manufactured by FujinonCorporation. Moreover, the flange wall can include means to secure theengagement. Specifically, the hub may include a pin, and the flange wallmay include means to receive such a pin in a sliding engagement. Suchmeans could be, for example, a channel or slit formed in the flangewall.

In further embodiments, the cylindrical body wall of the inventiveadaptor may comprise a flared extension at one end thereof.Specifically, this structure may extend beyond the end of thecylindrical body (e.g., beyond the second closed end). The flaredextension specifically may comprise an exterior surface which caninclude at least one pin extending therefrom. Such pin can beparticularly useful for engaging a securing receptacle formed in a watersource connector.

Further to the above, the specifically shaped and designed ends of thecylindrical body may be shaped to facilitate a press-fit, sealedengagement with the fluid transport elements on the endoscopic deviceand/or the water source connector without secondary engaging means. Thisis particularly beneficial because of the ease of use of a press-fitadaptor and the ability to prepare such adaptors in a verycost-effective manner that allows passage of the cost savings on to anend-user. Moreover, the press-fit adaptor would be useful with anendoscopic device while avoiding fluid loss since known in-line devicestypically include secondary means for securing the device, such as ascrew collar or the like. While the present adaptor may be described interms of a twist engagement, this merely relates to a twisting of thetwo components being connected to engage any retaining mechanism (e.g.,fully engaging a pin with an angled or L-shaped slot) and does notrequire the use of an additional locking mechanism, such as a screwcollar.

In light of the foregoing, it can be seen that the inventive adaptor canbe described as being shaped in the proximity of the first closed end toengage a fluid transport element extending from a portion of anendoscopic device. Particularly, the adaptor can be shaped to facilitatea twist-fit, sealed engagement with the fluid transport element on theendoscopic device without secondary engaging means. Similarly, theadaptor can be shaped in the proximity of the second closed end toengage a water source connector. Particularly, the adaptor can be shapedto facilitate a twist-fit, sealed engagement with the water sourceconnector without secondary engaging means.

In some embodiments, the adaptor further can comprise one or moresealing members. For example, a sealing member may be located at one orboth of the closed ends of the cylindrical body. In one embodiment, thesealing member can be a gasket.

In some embodiments, the adaptor may be formed as a single item that isshaped to provide the individual components. Such nature of theinventive adaptor may arise from the method of formation of the adaptorand the material used to form the adaptor. Specifically, the adaptor maybe formed of a polymeric material. As such, the adaptor may be describedas being formed of a plastic material. In some embodiments, thepolymeric material used to prepared an adaptor according to theinvention may be a material that is chemical resistant, heat resistant,or both chemical resistant and heat resistant.

In one embodiment, the adaptor body may be described as being a singlepiece of polymeric material having two channels formed therein.Preferably, the two channels do not intersect and are not in fluidconnection. One channel may be a liquid channel and the other channelmay be a gas channel. Both channels preferably are linear and may besubstantially or completely straight. The gas channel may be branchedand may be described as being substantially T-shaped, one line extendingthe length of the adaptor (i.e., from one closed end of the cylindricalbody to the opposing closed end) and the other line extending throughthe inlet port, for example, the second line extending substantiallyperpendicularly from the first line.

In light of the foregoing description, it is clear that the inventiveadaptor also may be described in terms of the method of manufacture. Forexample, the adaptor, particularly the adaptor body, may be described asbeing a molded part.

Thus, in some embodiments, the invention also can provide a method ofpreparing an adaptor for secondary gas provision in an endoscope. Themethod can comprise providing a mold shaped to form an adaptor body thatis a single, integral piece of polymeric material having two channelsformed therein, injecting a polymer into the mold, and allowing thepolymer to harden. Preferably, after the molding process, the edges ofthe adaptor body are free and clear of flashing and flecking. Further,preferably, the molding process is free of any mold release agent suchthat the molded part is free of any mold releasing agent. Moreover,preferably, the molding process is controlled such that the finishedpart is free and clear of any grease or other lubrication used in amolding tool.

In a particular embodiment, the present invention can provide an adaptorfor an endoscopic device, the adaptor being defined in relation to itsspecific form. For example, the invention can encompass an adaptor thatcan be a monolithic, polymeric material formed as a substantiallycylindrical body with closed ends and including two fluid transportchannels extending through the cylindrical body and opening at theclosed ends of the cylindrical body, one of the fluid transport channelsbeing branched and forming an inlet port extending outward from thecylindrical body. Further structures as described herein also could beincluded with such an adaptor.

In another aspect, the invention can provide methods of carrying out anendoscopic procedure. In one embodiment, a method according to theinvention can comprise using an assembly including an endoscopic device,a water source, a gas source, and an adaptor according to any embodimentdisclosed herein.

In a specific embodiment, a method for supplying a secondary gas in anendoscopic procedure can comprise the following steps: using anendoscope device having attached thereto a water source with aconnector; affixing between the water source connector and the endoscopedevice an adaptor according to the present invention; and supplying asecondary gas to the endoscope device via the gas inlet port on theadaptor. Specifically, the adaptor can comprise a substantiallycylindrical body having a wall, a first closed end, and a second,opposing closed end; a first fluid transport channel having a channelwall and extending through the cylindrical body and opening at the firstclosed end and the second closed end; a second fluid transport channelhaving a channel wall and extending through the cylindrical body andopening at the first closed end and the second closed end; and an inletport extending outward from the wall of the cylindrical body and havinga central passage extending through the wall of the cylindrical body andbeing in fluid connection with one of the first and second fluidtransport channels. Preferably, the secondary gas comprises carbondioxide, although other gases or combinations of gases could be used.

BRIEF DESCRIPTION OF THE DRAWINGS

Having thus described the invention in general terms, reference will nowbe made to the accompanying drawings, which are not necessarily drawn toscale, and wherein:

FIG. 1 is an illustration of an unmodified endoscope system thatincludes no means of providing a secondary gas supply;

FIG. 2 is a detailed view of the endoscope from the system illustratedin FIG. 1;

FIG. 3 is a perspective view of an adaptor according to one embodimentof the invention;

FIG. 4 is a bottom view of an adaptor according to one embodiment of theinvention;

FIG. 5 is a top view of an adaptor according to one embodiment of theinvention;

FIG. 6 is a front view of an adaptor according to one embodiment of theinvention;

FIG. 7 is a rear view of an adaptor according to one embodiment of theinvention;

FIG. 8 is an exploded view of an adaptor according to one embodiment ofthe invention;

FIG. 9 is a cross-section of an adaptor according to one embodiment ofthe invention;

FIG. 10 is an exploded view showing an adaptor according to oneembodiment of the present invention in position for placement in-linebetween a water source connector and the control body of an endoscopedevice;

FIG. 11 illustrates an adaptor according to one embodiment of theinvention placed in-line between a water source connector and thecontrol body of an endoscope device; and

FIG. 12 is a cross-section showing the press fit, in-line attachment ofan adaptor according to one embodiment of the invention placed between awater source connector and the control body of an endoscope device.

DETAILED DESCRIPTION

The invention now will be described more fully hereinafter throughreference to various embodiments. These embodiments are provided so thatthis disclosure will be thorough and complete, and will fully convey thescope of the invention to those skilled in the art. Indeed, theinvention may be embodied in many different forms and should not beconstrued as limited to the embodiments set forth herein; rather, theseembodiments are provided so that this disclosure will satisfy applicablelegal requirements. As used in the specification, and in the appendedclaims, the singular forms “a”, “an”, “the”, include plural referentsunless the context clearly dictates otherwise.

The present invention provides an adaptor that allows for the use of anysecondary gas during an endoscopic procedure. Endoscopic assembliestypically include a water source, such as a water bottle. These ofteninclude caps that have a dual-lumen tube that supplies air through onelumen to charge the water bottle. This charge gas may be considered aprimary gas. Any gas provided during an endoscopic procedure in additionto or in lieu of this charge gas may be considered to be a secondary gasaccording to the present invention. In one embodiment, the secondary gasis carbon dioxide.

Introduction of a gas into a body cavity is common practice ingastrointestinal endoscopic procedures. Previously, when it has beendesired to introduce a gas during an endoscopic procedure, standard roomair was simply introduced (such as from the light source). More recentlyit has been found that the use of carbon dioxide (CO₂) insufflation canimprove post-procedure patient comfort since CO₂ is more easily absorbedby the body. For example, use of CO₂ may be particularly useful for longendoscopic exams, such as endoscopic retrograde cholangiopancreatogram(ERCP), enteroscopy, and colonoscopy, and gas may be used in otherendoscopic procedures as well, such as endoscopic ultrasound (EUS) andesophagogastroduodenoscopy (EGD). Provision of a secondary gas sourcehas proven challenging, however. For example, the addition of CO₂ in anendoscopic procedure has previously required the use of cumbersomeexternal regulators, flow meters, and specialized valves. The advent ofspecialized equipment for the provision of a secondary gas in anendoscopic procedure, such as the CO₂EFFICIENT™ Endoscopic Insufflator(available from Bracco Diagnostics, Inc., Princeton, N.J.), hassimplified secondary gas supply. Still, though, the lack ofstandardization in endoscopic devices made by different manufacturerscontinues to complicate the provision of a secondary gas in associationwith a variety of endoscopic devices. For example, Pentax has availablea gas adaptor that is designed exclusively for its endoscopic devices.The Pentax adaptor, though, is relatively expensive, is designed formultiple uses, and can be difficult to use (for example requiringattachment via a screw collar). This design raises the issues of costand patient safety associated with the cleaning of reusable parts.Olympus and Fujinon have each addressed the provision of a secondary gaswhen using their respective endoscopic devices by providing waterbottles with bottle caps that include some means for attaching a gassource. Again, the cost of these parts can be prohibitive andsterilization between uses is still required. In contrast, the presentinvention has made possible the addition of a secondary gas in a mannerthat is easy to use, medically safe, and economical.

The ability to use any secondary gas of choice according to theinvention can be achieved through provision of an adaptor for use“in-line” with an endoscopic device. As discussed previously, endoscopicdevices typically include a main body to which a number of differentcord, tubes, or lines are attached. This provides for introduction oflight, fluids, and instruments into the body of a patient. As usedherein, the term “in-line” is understood to mean that the adaptor isdesigned to function with an endoscopic device by being positionedbetween two or more components of the device. Thus, “in-line” can meanthat the adaptor is positioned between two or more of a main body, acord, a tube, a line, a connector, or the like. A skilled person readilywould be able to envision the different parts of an endoscopic devicewhere an adaptor according to the invention would be positioned toprovide the function described herein. In specific embodiments, anadaptor according to the invention is designed for positioning in-linebetween the main body of an endoscopic device and the cord, tube, orline leading to a water source. Specifically, the adaptor may connect atone end to the main body of the endoscopic device and at another end toa water bottle connector.

In one aspect, the present invention provides an adaptor for anendoscopic device. The adaptor particularly is designed to be positionedin-line with existing components of an endoscopic device. Such design isevident by the disclosure provided hereinafter.

In certain embodiments, the adaptor generally can be described in termsof a number of individual components. Such description can indicate thatthe adaptor is formed of a number of separate components that arecombined to make the overall structure. In specific embodiments, though,the adaptor may be substantially a single, integral component. In otherwords, the adaptor may be a single, monolithic structure. In someembodiments, the adaptor may be a single, monolithic structure and mayfurther comprise one or more additional components, as described below.In preferred embodiments, the adaptor may be characterized by itssingle, integral nature, such as the express lack of any movable partsneeded to secure the adaptor to the remaining components of anendoscopic device. In specific embodiments, the adaptor may be describedas being formed of a body, one or more fluid transport components, andan inlet port that together are a single, monolithic structure. The termmonolithic is understood as meaning that the overall adaptor is aunitary structure having a seamless construction that cannot beseparated into its individual components without the use of destructivemeans, such as cutting the components apart.

Although the adaptor body preferably exhibits a single, integralstructure, the structure of the adaptor can be described in relation tothe function and shape of the various components or areas of theadaptor. For example, in some embodiments, the adaptor may be describedas having a body that has a specific shape. Particularly, the adaptormay have a substantially cylindrical body. Of course, the adaptor bodyis not necessarily limited to such geometry and could take on othercross-section shapes (e.g., a substantially square cross-section). Asused in relation to the adaptor body shape, the word “substantially” isintended to define the shape in that it need not necessarily begeometrically perfect. In other words, a substantially cylindrical bodycould have a cross-section that is a circle, but the circle could besomewhat elongated or flattened. Thus, a substantially cylindrical shapeis understood to provide a degree of variance from a cross-section thatis a perfect circle.

The length of the substantially cylindrical body can vary. As will bemore evident below, the adaptor typically will be placed in use betweenthe main body of an endoscope and a water source connector, and thelength of the adaptor body will affect the distance by which the watersource connector is separated from the endoscope main body. Preferably,the length of the adaptor is minimized but will still allow for easyaccess to the inlet port on the adaptor and provide sufficient space forconnection to the endoscope main body and the water source connector. Insome embodiments the adaptor body may have a length of about 2 cm toabout 8 cm, about 2 cm to about 7 cm, about 2 cm to about 6 cm, about 2cm to about 5 cm, about 2 cm to about 4 cm, or about 2 cm to about 3 cm.

Connection of the adaptor body to the endoscope main body and the watersource connector can be facilitated though the inclusion of specificstructures on the adaptor body. The nature of these additionalstructures can be expressly designed in relation to the brand ofendoscope. As noted previously, the three main manufacturers ofendoscope devices make devices with significantly different structures.For example, a Pentax endoscope main body includes a connector with oneor two pins extending from the outer surface of the connector. A watersource connector for a Pentax endoscope thus includes a slit forreceiving the pin. The inventive adaptor can be similarly designed.

In one embodiment, the adaptor body may include a flange in theproximity of one of the ends of the adaptor body. This flangeparticularly may include a wall that is substantially parallel to thewall of the adaptor body. The parallel wall thus may include means forreceiving a pin in a sliding engagement. Such means may be a groove,slit, channel, passage or similar opening that may be engaged by a pinor like element. The flange may be in the proximity of the adaptor bodyend such that the flange attaches to the wall of the adaptor body atsome distance behind the adaptor body end. Moreover, the parallel wallof the flange may have a length sufficient so that the parallel wallterminates beyond the end of the adaptor body. For example, in anembodiment wherein the flange attaches to the adaptor body approximately5 mm from the end of the adaptor, the parallel wall of the flangepreferably would have a length of at least about 6 mm. In specificembodiments, the parallel wall of the flange may have a length that issufficient to allow for twisting engagement with a pin on an endoscopebody.

In other embodiments, the adaptor body may include a flared extensionextending beyond one of the ends of the adaptor body. The flaredextension may be shaped specifically to facilitate attachment of theadaptor to a water source connector. For example, a water sourceconnector may include an aperture or other opening for receiving a pinin a twisting engagement. Thus, the flared extension may have anexterior surface with at least one pin extending therefrom.

In certain embodiments, the adaptor further may be described as having afirst fluid transport channel and a second fluid transport channel. Asused herein, the term “fluid” is intended to encompass any material thatmay be described in relation to flow, such as a gas or a liquid,including solutions or other physical forms of a liquid or a gas thatmay include some concentration of a solid material in a dissolved,suspended, or otherwise mixed state that does not prevent flow of theliquid or gas. Although the adaptor may be discussed and illustrated interms of a first and a second fluid transport channel, the adaptor isnot limited to only two such channels. Rather, the adaptor could includefurther fluid transport channels for use with devices where three ormore fluids may be transported through a common carrier (e.g., a liquidand two or more gases, a gas and two or more liquids, or two or moregases and two or more liquids). Preferably, each fluid transport channelis a separate, independent channel. In other words, the separatechannels do not interconnect, and a fluid in one channel may not bepassed into another channel.

The first and second fluid transport channels may be described as beingtubes or having a tubular shape. Thus, the fluid transport channels mayhave walls that delineate the fluid transport area (inside the walls)from the area exterior to the fluid transport channels. The channels ortubes can bridge the two ends of the adaptor body and thus be suspendedwithin the adaptor body. Alternately, one or more of the fluid transportchannels may share a wall with the wall of the adaptor. Thus, a portionof one of the channels may form a portion of the wall of the cylindricalbody. In other embodiments, one or more of the channels may even beformed so that they are entirely within the wall of the cylindricalbody. In specific embodiments, the fluid transport channels aresubstantially parallel. Preferably, the channels are arranged in aside-by-side arrangement. Of course, the invention also encompassesother arrangements of the fluid transport channels.

The interior of the adaptor body (wherein the fluid transport channelsmay be located) can be solid or can be open. Preferably, to reducecosts, the interior of the adaptor body is open, and at least onechannel is positioned within the adaptor body such that the walls of thechannel are not in physical contact with the walls of the adaptor bodyand/or the walls of another channel. Such open arrangement may bemaintained, however, in embodiments wherein the wall of one or morechannels may be integral with the wall of another channel and/or withthe wall of the cylindrical body of the adaptor.

The adaptor also can comprise an inlet port. The inlet port can be anyelement extending outward from the exterior surface of an adaptor bodyand being in fluid connection with at least one fluid transport channelwithin the adaptor body. The inlet port also can be described as being asubstantially tubular shaped element and/or as forming a channel thatintersects one of the previously described fluid transport channelsformed in the adaptor body. The inlet port particularly can be theelement that allows for introduction of a secondary gas, as moreparticularly described below.

The structure and function of the inventive adaptor are further seen inrelation to the various Figures. For example, FIG. 3 illustrates anadaptor 10 according to the invention. The adaptor 10 in FIG. 3comprises a substantially cylindrical body 12 that essentially forms thecore of the adaptor. The adaptor body 12 can be formed of a body wall 14and can include two closed ends 16 and 18, as shown in FIGS. 3 and 8.The wall 14 of the adaptor body 12 can terminate at the closed ends 16and 18. Alternately, as seen in FIG. 3, the wall 14 of the adaptor body12 can extend some distance beyond the closed end 16.

The adaptor 10 further comprises a first fluid transport channel 20 anda second fluid transport channel 30. Although more clearly illustratedin further figures described herein, the fluid transport channels extendfrom one closed end of the adaptor body to the opposing closed end ofthe adaptor and have openings at both ends. In such embodiments, theinterior of the adaptor body 12 is closed such that fluid passes onlythrough the defined channels and does not contact the interior surfaceof the adaptor body. In some embodiments, the adaptor body 12 may bedescribed as including a sealed chamber, and the fluid transportchannels may extend through the sealed chamber. Alternately, thecylindrical body of the adaptor may be substantially solid, and thechannels may form the only open space with the adaptor body.

It is understood that the terms “first” and “second” when used inrelation to the fluid transport channels are meant for ease ofunderstanding and are not intended to limit the invention. For example,in FIG. 3, the channel 20 with an opening position approximately in thecenter of the closed end 16 is described as the first fluid transportchannel. In other embodiments, the channel with an opening that isoff-center of the closed end 16 of the adaptor 10 could be described asthe first fluid transport channel.

The inventive adaptor 10 also comprises an inlet port 40 that extendsoutward from the wall 14 of the adaptor body 12. The gas inlet port 40may take on a variety of structures and can have any structure or takeon any form suitable to carry out the intended function, which is toprovide a port for inputting a secondary gas into the device. Inpractice, a secondary gas often may be provided via some type of tubingthat may or may not include a specialized connection unit (e.g., ascrew-on connection or a plug-in connection). For example, the gas inletport 40 could include a barb, thread, tapered, conical, or snap fittingconnection. Thus, the gas inlet port 40 may be designed to accommodatesuch a specialized connection. In one embodiment, the tubing may becoupled between the gas inlet port 40 and an insufflator unit inputtingthe secondary gas. In another embodiment, the adapter 10 may also oralternatively include an adhesive for coupling the inlet port 40 to aconnection associated with the secondary gas source. Regardless of thetype of connection that is to be accommodated, the gas inlet port 40 cancomprise a central passage 42 that passes through the wall 14 of theadaptor body 12. The central passage 42 of the gas inlet port 40preferably intersects the fluid transport channel that functions as agas transport channel. For example, in FIG. 3, the second fluidtransport channel 30 can be referred to as a gas transport channel 30,and the first fluid transport channel 20 can be referred to a liquidtransport channel 20. Thus, the positioning of the fluid transportchannels within the adaptor body 12 can be important to facilitateproper functioning of the adaptor. Specifically, as shown in theembodiment of FIG. 3, the liquid transport channel 20 is centralizedwithin the adaptor body 12, and the gas transport channel is off-settoward the wall 14 of the adaptor body 12. This positioning facilitatesease of interaction between the central passage 42 in the gas inlet port40 and the gas transport channel 30. In particular, the central passage42 can be in fluid connection with the gas transport channel 30 suchthat the central passage 42 extends and opens into the gas transportchannel 30. Such central passage 42 can be solely for passage of thesecondary gas or also can form an entry port for insertion of a gasconnection. For example, if the gas is to be provided via a devicehaving a specialized plug-in connector, the passage 42 can be formed toaccommodate the plug. Thus, the passage 42 can be described as being anannular passage with walls that may have formed therein specializedcomponents (e.g., grooves or threads) for receiving a plug. Thecomponents particularly may allow for removable attachment of a plugdevice for delivery of gas.

In specific embodiments, the gas inlet port 40 may substantially extendoutward from the wall 14 of the adaptor body 12 at a position that issubstantially close in position to the gas transport channel 30. Such astructure particularly is useful to accommodate attachment of a gas linehaving a screw-on component or a gas line that attaches by simply beingpressed over and onto the extending portion of the port 40 (e.g., astandard, flexible hose or tube).

In one embodiment, the gas inlet port 40 may comprise a luer connectoror any similar structure. Luer connection systems typically areassociated with the interconnection of syringes, catheters, hubbedneedles, IV tubes, and the like. A luer connection system consists ofround male and female interlocking tubes that may be slightly tapered tohold together better with even just a simple pressure/twist fit. Asillustrated in FIG. 3, the luer connector is a female component. In use,a male luer connector may simply slip inside the shown female componentand form a secure connection. The illustrated embodiment provides for aneven more secure fit through inclusion of an additional outer rim 44(which functions as a single thread). As shown, the rim 44 is formed oftwo separate “wings.” In use, the male luer connector can include anadditional outer rim of threading to form a “locked” connection.

The liquid transport channel 20 and the gas transport channel 30 eachopen to the environment at the closed end 16 of the adaptor body 12.Although not visible in FIG. 3, both channels likewise open to theenvironment at the closed end 18 of the adaptor body. In the embodimentof FIG. 3, the visible closed end can be referred to as the first closedend 16. Specifically, the first closed end 16 may be structured anddesigned for attachment to an endoscope device. For example, the wall 21of the liquid transport channel 20 may extend beyond the first closedend 16. Similarly, the wall 14 of the adaptor body 12 may extend beyondthe first closed end 16. Such arrangement may provide a topographicalstructure the particularly facilitates a sealed engagement with a fluidtransport element on an endoscope device.

Additionally, the inventive adaptor 10 may comprise a flange 110 that isattached to the wall 14 of the adaptor body 12 in the proximity of thefirst closed end 16. The flange 110 particularly can include a flangewall 115 that is substantially parallel to the wall 14 of the adaptorbody 12. The flange with its wall may be referred to herein as astationary sleeve. As seen in FIG. 3, the flange with the wall forms acomponent that substantially completely surrounds the first closed end16. As described further below, this provides means for engaging theadaptor 10 with the main body of an endoscope device. To this end, theflange wall 115 can include means for receiving an extension, such as apin, present on the endoscope device to secure the adaptor 10 to theendoscope. As illustrated in FIG. 3, the means comprise two receivingchannels 120 formed in the flange wall 115. Of course, any means usefulto receive an extension, such as a pin, could be used. Specifically, themeans could be a groove, aperture, or generally any opening that willallow an extension from the endoscope to interact with the inventiveadaptor to secure the two devices together. In FIG. 3, the receivingchannels 120 are formed with an angled portion 122 and a horizontalportion 124. Preferably, the horizontal portion 124 comprises one ormore locking teeth 125 that are useful to resist any twisting movementof the adaptor 10 once attached to the endoscope. In this embodiment,the adaptor 10 can attach to an endoscope by aligning the pins on theendoscope with the receiving channels 120 and pressing the adaptor 10toward the pins while twisting to cause the pins to slide through theangled portion 122 and into the horizontal portion 124 with the pins canengage the locking teeth 125.

Similar to the above, the second closed end 18 of the adaptor 10 may bestructured and designed for attachment to a water source connector. Forexample, the adaptor body wall 14 may comprise a flared extension 130,and this extension 130 may extend beyond the second closed end 18. Inparticular embodiments, the flared extension 130 can comprise anexterior surface with at least one pin 135 extending therefrom. Theflared extension and the associated pin can facilitate connection of thesecond end of the adaptor to a water source connector, particularly aconnector including one or more channels for receiving a pin as aconnection and/or locking mechanism.

An adaptor according to certain embodiments of the invention also isshown in FIG. 4 as a bottom view (i.e., looking directly at the gasinlet port 40). A top view of the adaptor 10 is shown in FIG. 5. As seenin this embodiment, the gas inlet port 40 can be formed to besubstantially perpendicular to the exterior surface of the adaptor body12. The fluid connection between the gas inlet port 40 and the gastransport channel 30 is also seen in FIG. 4. Specifically, the figureshows the central passage 42 of the gas inlet port 40 opening into thegas transport channel 30 via an opening in the wall 14 of the adaptorbody 12. Thus, the central passage 42 can be viewed as being separatefrom the gas transport channel 30 or can be viewed as being a branch ofthe gas transport channel 30.

As seen in the embodiment of FIG. 4, the external surfaces of thevarious areas of the inventive adaptor 10 may have different relativedimensions. In one embodiment, as illustrated, the various areas are allsubstantially cylindrical in shape. For example, the adaptor body 12 mayhave an outside diameter that is less than the outside diameter of theflared extension 130, and the flange 110 may have an outside diameterthat is less than the outside diameter of one or both of the adaptorbody 12 and the flared extension 130. The dimensions of the variouscomponents may be designed specifically to facilitate attachment of theadaptor to an endoscope and/or a water supply connector. The overalllength of the various areas of the adaptor also may have differingdimensions. For example, the length of the adaptor body 12 can begreater than the length of the flange 110 and the flared extension 130.

In some embodiments, the inventive adaptor may have an overall length ofabout 1.5 cm to about 8 cm. Even greater overall lengths are encompassedby the present invention; however, such greater lengths would beexpected to add only to the cost and not the function of the adaptor andthus, are not necessarily preferred. In other embodiments, the adaptormay have an overall length of about 2 cm to about 7 cm, about 2 cm toabout 6 cm, about 2 cm to about 5 cm, about 2 cm to about 4 cm, or about2 cm to about 3 cm.

Front and rear views of an adaptor 10 according to the invention areshown in FIG. 6 and FIG. 7, respectively. For ease of description, theend of the adaptor structured and designed for attachment to anendoscope is referred to as the front, and the end of the adaptorstructure and designed for attachment to a water source connector isreferred to as the rear of the adaptor. Such terms are not to beconstrued as limiting.

The adaptor of the invention may include further components in additionto those already described. Such further components may be separate fromthe monolithic structure of the adaptor. Such further components may beformed separately from the monolithic structure of the adaptor but maybe combined with the adaptor in such a manner so as to effectivelybecome an integral part of the overall structure.

In certain embodiments, such as illustrated in FIG. 8, the adaptor 10further may comprise one or more sealing members. As illustrated, agasket 200 is included and is sized appropriately to be place in theflared extension 130 at the second closed end 18. The gasket includestwo openings that correspond to the openings formed in the second closedend 18 by the first fluid transport channel 20 and the second fluidtransport channel 30. Of course, other types of sealing members areencompassed by the invention. As further described below, the sealingmember is useful for forming a fluid-tight connection between theadaptor and the devices to which it is attached. The sealing member canbe retained in contact with the second closed end by any appropriatemeans including gluing or simply sizing the gasket so that the edgesthereof contact the inner surface of the flared extension and maintainplacement by friction alone. The flared extension likewise could includea groove, lip, or other structural member useful to maintain the sealingmember in its position.

The overall structure of an adaptor 10 according to one embodiment ofthe invention particularly is illustrated in the cross-section providedin FIG. 9. As seen therein, the adaptor 10 can be described as being asingle, unitary structure with a number of channels formed therein.Specifically, the first fluid transport channel 20 and the second fluidtransport channel 30 are seen to both extend from the first closed end16 of the adaptor body 12 to the second closed end 18 of the adaptorbody 12. Further, the intersection of the second fluid transport channel30 and the central passage 42 of the gas inlet port 40 is illustrated.In the embodiment shown in FIG. 9, the body 12 of the adaptor 10 is asolid piece with the channels 20 and 30 formed therein. In otherembodiments, the body of the adaptor may be substantially hollow suchthat the walls of the channel 20 and optionally the channel 30 aredistinguishable inside the body of the adaptor and exist within thewalls 14 of the adaptor body 12.

The adaptor of the invention can be made of a variety of differentmaterials, which may affect how the adaptor is formed. In certainembodiments, the adaptor may be a machined part. As such, the adaptorparticularly may comprise a plurality of individual parts that aremachined separately and then combined to form the final adaptorassembly. Such combination can be by any means recognized as useful inthe art, such as gluing, welding or the like or using further attachmentcomponents, such as rivets, or the like.

In preferred embodiments, the inventive adaptor may be a molded part.This particularly is advantageous for providing the adaptor as a single,monolithic structure, which provides for a seamless construction. Inembodiments where the adaptor is reusable, this simplifies cleaning andensures no contaminants remain in seams, etc. existing between multipleparts that may be combined to form the adaptor. Thus, the final adaptorcan be formed to have no moving parts.

The adaptor of the invention is also beneficial in that it can beprovided as a single-use (i.e., disposable) adaptor or may be providedas a reusable adaptor. In some embodiments, the inventive adaptor can beboth single-use and reusable in that the end-user will have the optionto dispose of the adaptor after a single use or sterilize the adaptorand reuse it. This is achievable in particular because of the ability toform the adaptor from a variety of materials using a variety of methods.Thus, the adaptor can be sufficiently economical to justify making onlya single use to avoid the need to sterilize. At the same time, theadaptor can be sufficiently sturdy to withstand multiple sterilizationprocedures.

The adaptor can be formed from a variety of different materials. In someembodiments, the adaptor comprises a metal material. Preferably, themetal is non-corrosive (e.g., stainless steel or aluminum). In otherembodiments, the adaptor comprises a polymeric material, whichpreferably is chemical resistant, heat resistant, or both chemicalresistant and heat resistant. The use of medical grade plastic materialsis particularly desirable. In one specific embodiment, the polymericmaterial is a polysulfone (e.g., polyphenylsulfone) or a similarmaterial. Non-limiting examples of further polymeric materials that maybe used to form one or more component of the inventive adaptor includepolyethylene (e.g., UHME-PE), polypropylene, polymethylmethacrylate(PMMA), acetal copolymers, polythermide, polycarbonate, andpolyetheretherketone (PEEK). The sealing members can be formed of anymaterial recognized as useful in forming such elements, such as naturalor synthetic rubbers.

In one embodiment, the adaptor of the invention can comprise a singleplastic component and one gasket. The plastic component can be theadaptor body with two, opposing closed ends, and can include a liquidchannel and a gas channel, each channel extending through the adaptorbody and opening to the exterior at the opposing ends of the adaptorbody. The adaptor also can include a gas inlet that intersects the gaschannel and preferably is substantially perpendicular to the liquidchannel and the gas channel. Thus, the gas channel can open to theexterior at three points. The gasket can be located at one end of theadaptor body. Preferably, one end of the adaptor body comprises a flaredportion, and the gasket can be located within the flared portion againstthe body end.

The adaptor of the invention is particularly useful in light of thespecific design thereof that enables the adaptor to be inserted in-linewith a known endoscopic device. This is particularly illustrated in FIG.10, FIG. 11, and FIG. 12.

More particularly, the adaptor of the invention can be formed forspecific use with an endoscopic device from a particular manufacturer.As pointed out previously, typical endoscopic devices include a controlbody that connects to a variety of components; however, the connectionmeans vary based upon the manufacturer.

Accordingly, in one embodiment, an adaptor according to the presentinvention can be specifically designed and shaped for attachment to aFujinon-manufactured endoscopic device. More particularly, the adaptorcan be designed and shaped for insertion in-line between a water sourceconnector and a control body of a Fujinon OEM endoscope (i.e., anoriginal equipment manufacturer endoscope manufactured by FujinonCorporation).

The ability of the adaptor to be used in-line with an existingendoscopic device is seen in FIG. 10, where the inventive adaptor 10 ispositioned to be attached at one end to an endoscope control body 300and at the other end to a water source connector 400. The control body300 includes a fluid source hub 310, and the hub includes at least onepin 315 extending from a portion thereof. In typical use, the pin 315engages a receptacle 410 in the water source connector 400 in a twistingmotion to lock the two components together. The first end 16 of theadaptor 10 can be designed and shaped to engage the fluid source hub 310in a similar twisting fashion to lock the adaptor to the endoscopecontrol body 300. Specifically, the inventive adaptor 10 can engage thefluid source hub 310 such that the walls 115 of the flange 110 fit overand around the hub 310, and the wall of the hub 310 slides between thewalls 115 of the flange 110 and the wall 14 of the adaptor body 12 thatextend beyond the first closed end 16 of the adaptor 10. Uponattachment, the pin 315 on the hub 310 slides into the receiving channel120 formed in the wall 115 of the adaptor flange 110. By pressing theadaptor 10 toward the pin 315 while twisting, the pin slides through theangled portion 122 and into the horizontal portion 124 of the receivingchannel 120. At this point, the pins can engage the locking teeth 125 toprevent undesired disengagement. Preferably, the receiving channel 120of the inventive adaptor 10 is positioned on the flange wall 115 suchthat in a fully engaged position, the liquid transport channel 20 alignswith a liquid receptacle on the endoscope control body 300 and the gastransport channel 30 aligns with a gas receptacle on the endoscopecontrol body 300. As inventive adaptor is designed and shaped to engagethe fluid source hub on the endoscope control body, the inventiveadaptor can be described as including a portion that is substantiallyidentical in shape and dimension to the engaging portion of a watersource connector. Specifically, the portion of the adaptor in proximityto the first end of the adaptor may be designed and shaped to besubstantially identical in shape and dimension to the engaging portionof the water source connector.

Similarly, the second end 18 of the adaptor 10 can be designed andshaped to connect to the engaging portion of the water source connector400. A typical water source connector designed to engage the controlbody on an endoscope body manufactured by Fujinon Corporation includes asleeve surrounding a central cylinder with an annular space therebetweenfor receiving the wall of the fluid source hub 310. Thus, in specificembodiments, the second end 18 of the inventive adaptor 10 can bedescribed as including a flared portion 130 with a rim that is shapedand structured to engage the annulus of a water source connector.Specifically, the rim can include one or more pins 135 that engage achannel formed in the sleeve of the water source connector to secure theengagement of the two components. In particular embodiments, theinventive adaptor 10 can be described as including an end that issubstantially identical in shape and dimension to a portion of the fluidsource hub formed on the endoscope control body for attachment to thewater source connector.

The inventive adaptor particularly is advantageous in that it can beused simply as a press-fit device. Specifically, the adaptor can bedesigned to allow for being press-fit into engagement with the remainingcomponents, as described above. The use of a twisting motion to securethe press-fit engagement does not limit this description since theengagement and securing of the components can be achieved without theuse of any secondary engaging means (e.g., in the express absence of ascrew collar or the like).

The inventive adaptor 10 is shown in FIG. 11 fully engaging theendoscope control body 300 and the water source connector 400. As seenin FIG. 11, the gas inlet 40 on the adaptor 10 is positioned in thisengagement for ready attachment to a secondary gas source, such as aCO₂EFFICIENT Endoscopic Insufflator.

The engagement of the inventive adaptor with the endoscope control bodyand the water source connector is more readily evident in thecross-section provided in FIG. 12. As seen therein, the liquid transportchannel 20 aligns with a liquid transport channel 320 in the endoscopecontrol body 300 and with a liquid transport channel in the water sourceconnector 400. Further, the rim of the fluid source hub 310 on theendoscope control body 300 is engaging the annulus space between thewall 14 of the first end of the adaptor body 12 and the wall 115 of theflange 110. Likewise, the flared extension 130 on the second end of theadaptor 10 is engaging the water source connector 400, and the pins 135on the flared end 130 are positioned within the channels formed in theouter portion of the water source connector 400.

In specific embodiments, it is possible for the adaptor of the inventionto be attached to the endoscope control body and the water sourceconnector in different orientations. FIG. 12 illustrates a singleorientation. In alternate embodiments, the endoscope control body couldbe rotated 180° relative to the axis formed along the line of connectionbetween the endoscope control body, the inventive adaptor, and the watersource connector. Likewise, in other embodiments, the water sourceconnector could be rotated 180° around the same axis. In the possibleorientations for the connection of the endoscope body with the inventiveadaptor, gas flow from the adaptor to the endoscope body can be madepossible regardless of the alignment between the gas transport channelin the adaptor and any gas transport means provided in the endoscopebody. For example, the inventive adaptor may be formed such that thereis a sealed pocket formed between the interface of the adaptor andendoscope main body. In specific embodiments, the seal is formed by agasket that can be present as part of the endoscope main body. Thisgasket can be substantially similar to the gasket that is provided onthe opposing end of the inventive adaptor for creating a seal betweenthe adaptor and the water source connector. The gasket preferably iseffective to create a sealed area or compartment wherein gas can flowfreely between the adaptor and the endoscope body. Preferably, thesealed compartment allows for gas flow between the end of the adaptorand the endoscope body while preventing flow of the gas into any liquidchannel formed in the endo scope body for receiving liquid that istransported through the inventive adaptor. The structure is beneficialin that it facilitates gas flow regardless of how the user connects theadaptor to the endoscope body. Thus, the adaptor can be described asbeing attachable to the endoscope body independent of the orientation ofthe adaptor with respect to the endoscope body.

In light of the foregoing, it can be seen that, in certain embodiments,the adaptor of the invention can comprise a cylinder with a wall, twoopposing, closed ends, an inlet port extending outward from thecylinder, and at least two channels formed on the interior of thecylinder, extending the length of the cylinder, and opening at both endsof the cylinder. One end of the cylinder can include a stationary sleevethat forms an open annulus between the sleeve and the cylinder wall. Thesleeve can include one or more receiving channels that will receive apin in a twisting motion. The other end can include a flared wallextending beyond the cylinder end. The flared wall can include a pinthat will engage a receiving channel in a twisting motion. Preferably,the inlet port includes a passage that opens through the cylinder walland intersects one of the channels formed on the interior of thecylinder.

In other aspects, the present invention also provides various methodsthat make use of the inventive adaptor. For example, the invention canbe directed to methods of performing an endoscopic procedure. In oneembodiment, the method can comprise using an assembly that includes anendoscopic device, a water source, a gas source, and an adaptoraccording to any of the embodiments described herein. In other words,the inventive adaptor could be combined at the point of use with an OEMendoscope, particularly an endoscope having a fluid transport hub thatengage a receptacle in a water source connector, such as an endoscopemanufactured by Fujinon Corporation.

As previously noted, the present invention is particularly beneficial inthat it allows for the easy and efficient delivery of a secondary gas toan endoscope. Thus, in other aspects, the present invention also can bedirected to methods for supplying a secondary gas in an endoscopicprocedure. In certain embodiments, the method can comprise using anendoscope device having attached thereto a water source with aconnector. Particularly, the endoscope device can have a fluid transporthub that engages a receptacle in the water source connector. The methodfurther can comprise using an adaptor according to any embodiment of thepresent invention. In particular, the method can comprise affixingbetween the water source connector and the endoscope device an adaptoraccording to the present invention and supplying a secondary gas to theendoscope device via the gas inlet port on the adaptor. Although any gassuitable for use in medical or veterinary procedures could be supplied,in particular embodiments, the secondary gas can comprise carbondioxide.

Many modifications and other embodiments of the inventions set forthherein will come to mind to one skilled in the art to which theseinventions pertain having the benefit of the teachings presented in theforegoing descriptions. Therefore, it is to be understood that theinventions are not to be limited to the specific embodiments disclosedand that modifications and other embodiments are intended to be includedwithin the scope of the appended claims. Although specific terms areemployed herein, they are used in a generic and descriptive sense onlyand not for purposes of limitation.

That which is claimed:
 1. An adaptor for an endoscopic device, theadaptor comprising: a substantially cylindrical body having a wall, afirst closed end, and a second, opposing closed end; a first fluidtransport channel having a channel wall and extending through thecylindrical body and opening at the first closed end and the secondclosed end; a second fluid transport channel having a channel wall andextending through the cylindrical body and opening at the first closedend and the second closed end; and an inlet port extending outward fromthe wall of the cylindrical body and having a central passage extendingthrough the wall of the cylindrical body and being in fluid connectionwith the first or second fluid transport channel.
 2. The adaptor ofclaim 1, wherein the cylindrical body comprises a flange in theproximity of the first closed end.
 3. The adaptor of claim 2, whereinthe flange comprises a flange wall that is substantially parallel to thewall of the cylindrical body.
 4. The adaptor of claim 3, wherein theflange wall comprises means for receiving a pin in a sliding engagement.5. The adaptor of claim 1, wherein the cylindrical body wall comprises aflared extension extending beyond the second closed end.
 6. The adaptorof claim 5, wherein the flared extension comprises an exterior surfacewith at least one pin extending therefrom.
 7. The adaptor of claim 1,further comprising a sealing member located at the exterior surface ofone or both of the first and second closed ends.
 8. The adaptor of claim7, wherein the sealing member is a gasket.
 9. The adaptor of claim 1,wherein the inlet port comprises a luer, barb, tapered, threaded, snapfitting, or conical connector.
 10. The adaptor of claim 1, wherein theinlet port is substantially perpendicular to the wall of the cylindricalbody.
 11. The adaptor of claim 1, wherein the adaptor is a single,monolithic structure.
 12. The adaptor of claim 1, wherein the firstfluid transport channel is a liquid channel, the second fluid transportchannel is a gas channel, and the central passage in the inlet port isin fluid connection with the gas channel.
 13. The adaptor of claim 12,wherein a portion of the gas channel forms a portion of the cylindricalbody wall.
 14. The adaptor of claim 12, wherein the gas channel isformed within the cylindrical body wall.
 15. The adaptor of claim 1,wherein the adaptor is shaped in the proximity of the first closed endto engage a fluid transport element extending from a portion of theendoscopic device.
 16. The adaptor of claim 15, wherein the adaptor isshaped to facilitate a twist-fit, sealed engagement with the fluidtransport element on the endoscopic device without secondary engagingmeans.
 17. The adaptor of claim 1, wherein the adaptor is shaped in theproximity of the second closed end to engage a water source connector.18. The adaptor of claim 17, wherein the adaptor is shaped to facilitatea twist-fit, sealed engagement with the water source connector withoutsecondary engaging means.
 19. The adaptor of claim 1, wherein the firstand second fluid transport channels are substantially parallel.
 20. Theadaptor of claim 1, wherein the adaptor is shaped for attachment to aFujinon-manufactured endoscopic device.
 21. The adaptor of claim 1,wherein the adaptor comprises a polymeric material.
 22. The adaptor ofclaim 21, wherein the polymeric material is chemical resistant, heatresistant, or both chemical resistant and heat resistant.
 23. Theadaptor of claim 1, further comprising a tubing coupled between theinlet port and an insufflator unit for supplying a secondary gas sourceto the first or second fluid transport channel.
 24. The adapter of claim1, wherein the inlet port comprises an adhesive for coupling to aconnector associated with a secondary gas source.
 25. A method ofperforming an endoscopic procedure, the method comprising using anassembly including an endoscopic device, a water source, a gas source,and an adaptor according to claim
 1. 26. An adaptor for an endoscopicdevice, the adaptor being a monolithic, polymeric material formed as asubstantially cylindrical body with closed ends and including two fluidtransport channels extending through the cylindrical body and opening atthe closed ends of the cylindrical body, one of the fluid transportchannels being branched and forming an inlet port extending outward fromthe cylindrical body.
 27. The adaptor of claim 26, wherein the two fluidtransport channels are in a side-by-side arrangement.
 28. A method forsupplying a secondary gas in an endoscopic procedure, the methodcomprising: using an endoscope device having attached thereto a watersource with a connector; affixing between the water source connector andthe endoscope device an adaptor comprising: a substantially cylindricalbody having a wall, a first closed end, and a second, opposing closedend; a first fluid transport channel having a channel wall and extendingthrough the cylindrical body and opening at the first closed end and thesecond closed end; a second fluid transport channel having a channelwall and extending through the cylindrical body and opening at the firstclosed end and the second closed end; and an inlet port extendingoutward from the wall of the cylindrical body and having a centralpassage extending through the wall of the cylindrical body and being influid connection with the first or second fluid transport channel; andsupplying a secondary gas to the endoscope device via the gas inlet porton the adaptor.
 29. The method of claim 28, wherein the secondary gascomprises carbon dioxide.